Mitsubishi Melsec-L Series User Manual page 292

Error code
Error
(Hexa-
decimal)
7D18 Too few digits error
H
Invalid number of
7D19
H
digits error
7D1A Data length error
H
7D1B Value range error
H
Data length setting
7D20 error, data quantity
H
setting error
Decimal point
7D21
H
position error
7E00
H
to System error
7E05
H
Buffer memory
7E06
H
address setting error
7E07 System error
H
Currently
7E08
H
inexecutable error
7E09
H
System error
7E0A
H
7E40 Command error
H
7E41 Data length error
H
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Description
• When data are received by the protocol
including a packet that contains a
conversion variable (variable number of
data), the number of digits
corresponding to the variable is
insufficient.
• When data are received by the protocol
including a packet that contains a
conversion variable (variable number of
data and variable number of digits), the
corresponding data is 0 bytes (0 digits)
or exceeds the maximum number of
digits.
• In the data received from the external
device, the Length value does not
match the data length of the conversion
variable(s).
• When the protocol used for data
reception includes a packet that
contains a conversion variable, a value
of the data for the conversion variable
exceeds the range allowed for the C24.
• The value set in the data length storage
area or the data quantity storage area is
out of range.
• An out-of-range decimal point position
is set when the number of decimals is
set to Variable point.
• The number of decimals is larger than
the number of digits for each data.
• The OS of the C24 detected some
error.
• Transmit/receive buffer memory
addresses are in the special
applications area.
• The OS of the C24 detected some
error.
• The UINI instruction was executed
during execution of the programmable
controller CPU information clear.
• The OS of the C24 detected some
error.
• A nonexistent command or
subcommand was designated.
• A data length exceeding the number of
points that can communicate during
random read/write was designated.
Signal
Corrective action
name
• Correct the data sent from the device.
• Check the packet format of the external
CHn
ERR. device to see if the number of digits is
set correctly.
• Correct the data sent from the device.
• Check the packet format of the external
CHn
ERR. device to see if the number of digits is
set correctly.
• Check the data sent from the external
device to see if:
1) The Length value is correct or not.
2) Any of the data corresponding to the
CHn
conversion variable is missing or
ERR.
not.
• Check the packet format of the external
device to see if the conversion variable
is set correctly.
• Check the data sent from the external
device.
• Check the packet format of the external
device to see if the conversion size is
set correctly.
CHn
1) If it exceeds the range for word data,
ERR.
change the conversion size setting
to Double word.
2) If it exceeds the range for double-
word data, change the element to
Non-conversion variable.
• Check the maximum allowable data
length, and specify the maximum length
or less in the data length storage area.
CHn
• Check the maximum allowable data
ERR.
quantity, and specify the maximum
quantity or less in the data quantity
storage area.
• Correct the decimal point position.
• Check the number of digits setting, and
CHn
set the decimal point position so that
ERR.
the number of decimals is less than the
number of digits.
⎯
( 1)
• Change the buffer memory addresses so
⎯
that they are outside the special
applications area.
⎯
( 1)
• Execute the UINI instruction while the
⎯
programmable controller CPU
information clear is not executed.
⎯
( 1)
• Check and correct the external device
PRO. transmit message and restart data
communications.
• Check and correct the external device
PRO. transmit message and restart data
communications.
15 TROUBLESHOOTING
Protocol
Non- Bi-
Pre-
MC proce- direc-
defined
dural tional
15 - 23